[SmG Storm]

ok as i said i am new to ios because android really fucked me over recently,
i have a few questions to ask anyone with a jailbroken device
(beasty if you could please try to post on it)
#1- will a jailbroken device update on it's own (which is really stupid if it did prompt you IMO)
now i know it's a bit extreme but as all stories it starts with a girl >_>
she plays a game but she needs some in app purchases for free for it and the only way (that i know) to do that is through jailbreak and i told her all the cons and the pros and she is willing to do it for a game :) someone tell me what could go wrong?
#2- she is a girl and knows nothing about tech stuff so she could potentially brick her device... so tell me what could go wrong?
all she cares about is her stupid fucking game so if it is safe to jailbreak just for her game then i would do it.